Unlock instant, AI-driven research and patent intelligence for your innovation.

Catalytic synthesis method for 2, 3-dichloro-1, 1, 1-trifluoro propane

A technology of trifluoropropane and synthesis method, applied in 2 fields, can solve the problems of harsh reaction conditions, complicated catalyst preparation process, etc., and achieve the effect of good conversion rate

Active Publication Date: 2014-01-29
ZHEJIANG QUHUA FLUOR CHEM +1
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This method has the disadvantages that the catalyst preparation process is complicated and the reaction conditions are harsh.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Catalytic synthesis method for 2, 3-dichloro-1, 1, 1-trifluoro propane

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] After preheating trifluoropropene and chlorine to 100°C respectively, they are mixed into a 640ml carbon steel fixed-bed reactor capable of receiving materials. 2 o 3 The addition reaction is carried out under the action of a catalyst, the material ratio of trifluoropropene and chlorine is controlled at 2:1, the reaction temperature is 220°C, the pressure is 1.0Mpa, and the reaction space velocity is 50h -1 , the sample analysis of the reactor outlet material shows that the conversion rate of chlorine gas is 70.6%, and the selectivity of 2,3-dichloro-1,1,1-trifluoropropane is 98.1%.

Embodiment 2

[0025] After preheating trifluoropropene and chlorine to 150°C respectively, they are mixed into a 640ml carbon steel fixed-bed reactor capable of receiving materials. 2 o 3 The addition reaction is carried out under the action of a catalyst, the material ratio of trifluoropropene and chlorine is controlled to be 1:1, the reaction temperature is 290°C, the pressure is OMpa, and the reaction space velocity is 600h -1 , the sample analysis of the reactor outlet material shows that the conversion rate of chlorine is 88.2%, and the selectivity of 2,3-dichloro-1,1,1-trifluoropropane is 91.5%.

Embodiment 3

[0027] After preheating trifluoropropene and chlorine to 120°C respectively, they are mixed into a 640ml carbon steel fixed-bed reactor capable of receiving materials. 2 o 3 The addition reaction is carried out under the action of a catalyst, the material ratio of trifluoropropene and chlorine gas is controlled to 0.5:1, the reaction temperature is 260°C, the pressure is 0.8Mpa, and the reaction space velocity is 200h -1 , The conversion rate of trifluoropropene: 84.7% and the selectivity of 2,3-dichloro-1,1,1-trifluoropropane: 75.3% are obtained by sampling and analyzing the material at the outlet of the reactor.

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention discloses a catalytic synthesis method for 2, 3-dichloro-1, 1, 1-trifluoro propane, which is characterized in that 3, 3, 3-trifluoropropene and chlorine gas are used as raw materials, firstly, the 3, 3, 3-trifluoropropene and the chlorine gas are respectively preheated to 100 to 150 DEG C, the mol ratio of the 3, 3, 3-trifluoropropene and the chlorine gas is controlled to be 0.5 / 1 to 2 / 1, the 3, 3, 3-trifluoropropene and the chlorine gas enter a fixed bed reactor after being mixed by a mixer, and the reaction is carried out under the effect of gamma-Al2O3 catalysts. In the reaction process, the reaction temperature is controlled to be 220 to 290 DEG C, the reaction pressure is 0 to 1.0 MPa, the air speed is 50 to 1000h<-1>, and both the reaction conversion rate and the target product selectivity are high. The method has the advantages that the process flow is short, the catalysts are easy to obtain, the continuous operation can be realized, the industrial amplification is easy, and the like.

Description

technical field [0001] The present invention relates to the synthetic method of hydrofluorochlorocarbon. Specifically, it relates to the synthesis method of 2,3-dichloro-1,1,1-trifluoropropane. Background technique [0002] 2,3-Dichloro-1,1,1-trifluoropropane is an important fine chemical, which can be used as a high-efficiency refrigerant, foaming agent, etc. In addition, because 2,3-dichloro-1,1,1-trifluoropropane contains active chloride ions, it can undergo various reactions to synthesize a variety of downstream compounds, such as the new refrigerant HFO-1234yf, etc., which has great applications potential. [0003] According to literature research, it is found that there are two main routes for synthesizing 2,3-dichloro-1,1,1-trifluoropropane. [0004] (1) 3,3,3-trifluoropropene and chlorine react under the action of a catalyst to synthesize 2,3-dichloro-1,1,1-trifluoropropane; [0005] (2) 3,3,3-trifluoropropene and chlorine react under photocatalysis to synthesize...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C07C19/10C07C17/04
Inventor 吴晓军陈欣周强王树华王晓宇周华东徐冬苏利红龚海涛陈科峰
Owner ZHEJIANG QUHUA FLUOR CHEM